3. Fault Confirmation
__________________

 A. Job Set-UP
 (1) Aircraft Maintenance Configuration
 (a) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

 (b) On the FCU, make sure that the AP 1 and AP 2 are not engaged (the two pushbutton switches are off).

 (c) On the FCU, make sure that the FD 1 and FD 2 are engaged (the two pushbutton switches are on).

 B. Make sure that this(these) circuit breaker(s) is(are) closed: -------------------------------------------------------------------------------
PANEL ------ DESIGNATION ------------------------------ ------------------------ IDENT. LOCATION-------------------
49VU AUTO FLT/FCU/1  9CA1  B05
 49VU AUTO FLT/FMGC/1  10CA1  B02
 121VU AUTO FLT/FCU/2  9CA2  M21
 121VU AUTO FLT/FMGC/2  10CA2  M17
 C. Test
 (1) Do this test:
 ------------------------------------ACTION  ------------------------RESULT -------------------

-------------------------------------------------------------------------------
1. On the FCU:  - The FD 2 pushbutton switch goes off.
 - push the FD 2 pushbutton switch.

 - Push the A/THR pushbutton  - The A/THR pushbutton switch comes on. switch.

 - Push the A/THR pushbutton  - The A/THR pushbutton switch goes off. switch.

 2. On the FCU:  - The FD 1 pushbutton switch goes off
 - push the FD 1 and FD 2  and the FD 2 comes on. pushbutton switches.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞22-31-00∞∞∞∞∞∞∞∞∞∞Page 206
 Feb 01/98 CES

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
- Push the A/THR pushbutton  - The A/THR pushbutton switch comes on. switch.
 (2) If the A/THR does not engage after you try to engage the A/THR two times:
 - do the operational test of the engine/autothrust system isolation (Ref. AMM TASK 22-30-00-710-003).
 4. Fault Isolation
_______________
 A. If the A/THR does not engage when you open the circuit breaker 10CA2 only:
 - do the operational test of the AFS (Ref. AMM TASK 22-96-00-710-001) and read the result for the FMGC 1.
 (1) If the test gives the maintenance message AFS : FMGC 1/ATHR DISC CKT:

 - do a check and repair the wiring of the ATH INST DISC NO and ATH INST DISC NC discretes (from the FMGC 1 (1CA1) to the two relays (5CA1 and 5CA2)) (Ref. ASM 22-31/01).

 (2) If the test gives the message LRU TEST NOT COMPLETED:

 - push the line key adjacent to the RETURN indication until the AFS MAIN MENU page comes into view

 - push the line key adjacent to the TROUBLE SHOOTING DATA indication

 - push the line key adjacent to the FG 1 COM indication, then FG 1 MON indication: . make sure that there is a snapshot related to an event 1 at AFS TEST time

 - on word 5, make sure that the third number is equal to: . 1 or 3 or 5 or 7 or 9 or B or D or F (on command and monitoring channels).
 (a) If the third number is not equal to the above values on the command channel:
 - do a check of the wiring of the ATH OWN ENGD COM OPP discrete on the FMGC 1 (1CA1) (from pin AA/14D to pin AB/1D)

 - do a check of the wiring of the ATH OWN ENGD COM OWN discrete on the FMGC 1 (1CA1) (from pin AB/12D to pin AB/1F) (Ref. ASM 22-31/01).

 1 If there is no continuity:
_ - repair the above wiring.
 2 If there is continuity:
_
 - replace the FCU (2CA) (Ref. AMM TASK 22-81-12-000-001) and (Ref. AMM TASK 22-81-12-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞22-31-00∞∞∞∞∞∞∞∞∞∞Page 207
 Feb 01/98 CES a If the fault continues:

_
 - do a check and repair the wiring of the A/THR 1 SW COM discrete from the FCU (2CA) to the FMGC 1 (1CA1) (Ref. ASM 22-31/01).
 (b) If the third number is not equal to the above values on the monitor channel:
 - do a check of the wiring of the ATH OWN ENGD MON OPP discrete on the FMGC 1 (1CA1) (from pin AD/14F to pin AE/1D)